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Pattern of Differential Divergence Among Five Insular Species of the Aspidoscelis hyperythra Complex (Squamata: Teiidae), Baja California Sur, México
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Pattern of Differential Divergence Among Five Insular Species of the Aspidoscelis hyperythra Complex (Squamata: Teiidae), Baja California Sur, México
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Pattern of Differential Divergence Among Five Insular Species of the Aspidoscelis hyperythra Complex (Squamata: Teiidae), Baja California Sur, México
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Journal Article
Pattern of Differential Divergence Among Five Insular Species of the Aspidoscelis hyperythra Complex (Squamata: Teiidae), Baja California Sur, México
2014
Overview
The most recent taxonomic revision of the Aspidoscelis hyperythra complex of teiid lizards from Baja California referred all peninsular populations to A. hyperythra and recognized five insular populations as species based on their diagnosability and allopatric distributions. We used multivariate analyses of seven quantitative morphological characters to determine relative distinctiveness and divergence among these populations and the four geographically closest peninsular populations of A. hyperythra. The two northernmost insular species, Aspidoscelis picta (Isla Monserrate) and Aspidoscelis carmenensis (Isla Carmen) were significantly more divergent than were Aspidoscelis danheimae (Isla San José), Aspidoscelis franciscensis (Isla San Francisco), Aspidoscelis espiritensis (Islas Espiritu Santo and Partida Sur), and peninsular samples of A. hyperythra. Divergence information from mtDNA sequence variation divided the five insular species into the same high-divergence/low-divergence groups. We present new testable hypotheses relating to relative times of colonization and peninsular location of the source population of island colonists. La revisión taxonómica más reciente del complejo Aspidoscelis hyperythra de lagartijas teidas de Baja California considera a todas las poblaciones peninsulares como A. hyperythra y reconoce cinco poblaciones insulares como especies basándose sobre en características diagnósticas y distribuciones alopátricas. Utilizamos análisis multivariado de siete características morfológicas cuantitativas para determinar la diferencia y divergencia relativas entre estas poblaciones y las cuatros poblaciones peninsulares más cercanas geográficamente de A. hyperythra. Las dos especies insulares más septentrionales, Aspidoscelis picta (Isla Monserrate) y Aspidoscelis carmenensis (Isla Carmen) fueron significativamente más divergentes que Aspidoscelis danheimae (Isla San José), Aspidoscelis franciscensis (Isla San Francisco), Aspidoscelis espiritensis (Islas Espíritu Santo y Partida Sur), y muestras peninsulares de A. hyperythra. Información sobre la divergencia de estas especies a partir de variación en las secuencias de ADN mitocondrial dividió las cinco especies insulares en los mismos grupos de alta-divergencia/baja-divergencia. Presentamos nuevas hipótesis comprobables sobre los tiempos relativos de colonización y ubicación peninsular de las poblaciones fuente que colonizaron las islas.
Publisher
the Society for the Study of Amphibians and Reptiles,Society for the Study of Amphibians and Reptiles
Subject
